Animate Text bpy.ops.transform.translate
Ditch the operators


Test run with default text and default bezier circle objects

Below is code which does, what I believe to be, same as above, but without any operators.  For case of example I have used an object named "Text" in scene for text object, and an object named "BezierCircle" for the curve. Change to suit

import bpy
from mathutils import Matrix, Vector
from math import radians

context = bpy.context
scene = context.scene

text = scene.objects.get("Text")
curve = scene.objects.get("BezierCircle")

if text and curve:
    # add modifier
    cm = text.modifiers.new("foo", 'CURVE')
    cm.object = curve
    cm.deform_axis = 'NEG_X'
    # rotate 
    R = Matrix.Rotation(radians(90), 4, 'X')
    text.matrix_world @= R # replace @ with * for pre 2.8
    # translation
    text.matrix_world.translation += Vector((12.8872, 0, 0))
    # insert keyframe
    text.keyframe_insert("location", frame=1)
    # and again
    text.matrix_world.translation += Vector((-11.6886, 0, 0))
    text.keyframe_insert("location", frame=249)